Heating apparatus



Dec. 9, 1930. M. M. SUPPES 1,784,796

HEATING APPARATUS Filed March 15, 1929 3 Sheena-Sheet 1 Dec. 9, 1930. M. M. SUPPES HEATING APPARATUS Fileu March 15, 1929 5 Sheets-Sheet 2 auoewcoz Dec. 9, 1930. SUPPEg 1,784,796

HEATING APPARATUS %W 293%; 2;; mm

Patented Dec. 9, 1930 warren STATES.

PATENT OFFICE MAX M. SUPPES, or ELYRIA, orrro, ASSIGNOR TO THE BOX scanner. COMPANY, or

ELYRIA, OHIO, A oonronarrou or onto HEATING APPARATUS Application filed March 15, 1929. Serial No. 347,201.

My invention relates to new and useful i111. provementsin heating apparatus, and more particularly to means for supplying secondary air to the combustion space of a heating apparatus.

An object of my invention is to provide an apparatus in which there will be complete combustion, and the gases and particles suspended therein and visible as smoke, will be consumed within the apparatus.

Another object of my'invention is to provide means for preheating secondary air so that it will more readilymix with the gases and particles to insure complete combustion.

Another object is to provide means for efticiently and uniformly preheating the secondary air to a high temperature.

In the accompanying drawingsfto be taken as a part of this specification, I have fully and clearly illustrated a preferred embodiment of my invention, in which drawings Figure 1 is a view in vertical central section of a part of a heating apparatus embodying the air preheating means of my invention;

Fig. 2 is a view in horizontal section on the line 2 2 of Fig. 1;

the line 33 of Fig. l; V

Fig. 4 is a detail bottom plan view of a guard or cover member, and

Fig. 5 is a detail bottom plan view of my air preheating means.

Referring to the drawings by characters of reference, 1 designates generally a heating apparatus comprising an ash-pit or re ceptacle 2, a fire-pot 3 and a combustion chamber 4.- The ash receptacle 2 rests upon cross bars 5 supported at their opposite ends by a substantially rectangular base frame 6 having legs or feet 7. Through the top wall 8 of the receptacle 2 is a substantially circular aperture or grate opening 9 for commimication between the fire-pot 3 and the receptacle 2. Within the receptacle 2 is agrate structure 10 which is positioned beneath the open ing 9 to support a bed of fuel in the firepot 3 which rests upon the wall 8 and surrounds the opening 9. The fire-pot 3, which is substantially in the form of an inverted truncated hollow cone, has a lateral surround- Fig. 3 is a detail view in vertical section on ing flange 11 at its top edge, in which is a circumferential upwardly open groove or recess 12. Seated in the groove 12 for substantially 270 of the circumference, is the lower edge of a casing member 13' comprising the combustion chamber 4 and a fuel-charging throat 14 which'is substantially rectangular in cross-section. The under side of the throat 14 is open and is closed by a plate member 15 having a curved inner edge 16 conforming to the curve of the fire-pot and having a depending arcuate flange 17 which seats inthe groove 12, and the ends ofwhich abut the wall of the combustion chamber 4. On the top faceeof the horizontal side portions 18 of the member 15 and along the side edges thereof are spaced substantially parallel ribs or beads 19 providing grooves or recesses 20 which terminate at their inner ends over the groove 12 so that thebottom edges of the side walls 21 of the throat14 seat therein. The portion 18 of member 15 and the walls 21 are provided with cooperating lateral lugs 22, 23, respectively, which areclamped together by bolts 24, or the like. Through the member 15 is an aperture or slot 25 which is. substantially rectangular and extends along and adjacent to the front edge of the plate member. From the rear edge 26 of the aperture 25 extends ahorizontal bottom portion 27 which is in a plane below the portions 18 and is joined thereto by vertical walls 28 such that the member 15 has a channel or open-ended recess 29 therein which leads from the aperture 25 to the combustion chamber substantially in the plane of the top of the fire-pot. The rear edge of the aperture 25 inclines inwardly from the ends thereof toward the center point of the aperture 25 so that the aperture is Wider at its ends than at its center part. Dependingfrom the member 15 at the periphery of the aperture 25, are front and rear walls or members 30, 31, re-; spectively, joined by end walls ormembers 32, all of which members converge slightly downward and terminate in a common horizontal plane. The members 30, 31 and32 form the upper part or section of an air preheating chamber 33, the lower part or section beingsecured thereto and comprising front and rear walls or members 34, 35 joined by end walls or members 36 which diverge slightly downward and merge into vertical portions 37 which terminate in a common horizontal lane. Extendin inwardl from P c y the end walls 32 are flanges 38, and extending inwardly from the end walls 36 are cotom edges of the end walls 36 are outwardly extending flanges 41 whichserve as supporting means for a bottom wall or closure inem ber 42 for the chamber 33, and which is clamped to the flanges 41 by bolts 43, o l the like. Through the wall 42 are spaced inlet apertures 44, and within the chamber 33 and resting slidably on the wall 42 is a damper p1ate'45 having apertures 46 therethrough, which may be moved into or out of registry with apertures 44 to control the inlet of air to the chamber 33 and the combustion chan1- her 4. Secured to the plate 45 is anoperating member 47 which extends through a slot 48 in wall 42, and to which is secured a. rod 49 for reciprocation of the plate 45. Overlying the channel 29 is a guard plate or closure member 50 which rests at its side edges upon the side portions Band at its front edge on the front portion l8 of member 15, and the rear edge 51 of which is curved to conform to the curve of the fire-pot 3. From the under side of member 50 depends a partition 52 which abuts the portion 27 and divides the channel 29 into substantially equal air inlets 53. The partition 52 extends across the aperture 25 and extends downward into chamber 33, as at 54, so that the partition 52 serves additionally to lock the guard plate 50 againstmovement toward or fromthe chamber 4. At the ends of the slot 25 are substantially vertical lugs 55 which serve to support a coal chute, which I- have not shown, as the same is not necessary to a clear understanding of my invention. The lugs 55 also serve to prevent lateral displacement of the guard plate 50 which is cut away or recessed at its front corners, as at 56, to lie between the lugs 55.

Surrounding the open front of the throat 14 and secured to the members 13 and -15, as by bolts 56 is a substantially rectangular frame 57 providing an inlet to the charging throat and having a surrounding groove 58 in its rear face in which seats the front edge of the casing member'13 and the portion 18 of member 15. Pivotally supported at one side of the frame 57 are hinge arms 58 which are secured to and support a door or closure member 59 which normally abuts the frame 57 to close the inlet to the charging throat. Surrounding the open front of and secured to the ash receptacle 2 is a supporting frame I Through the front portion 65 are openings 69,

which register with the throat inlet and the open front of the ash receptacle, respectively.

Screws 71, or the like, passed through the portion 65 adjacent the marginal edges of the openings 69, 70 and threaded into the frames 57, 60, serve to rigidly secure the casing 62 in position. The air preheating chamber 33 is positioned in the space 62, but the portion 65 is provided with an aperture 7 2 to permit the lower section of the chamber 33 to project therethrough, due to the inclination of the front wall 34. The heat-emitting element is enclosed bya jacket or outer casing 73, comprising vertical front, side and rear panels designated 74, 75, 76', 7 7 respectively, which are joined in any suitable manner along their vertical side edges,:and which rest upon the base frame 6, The top of the jacket 73 is closed by a top member 78, preferably having a grill-work, not shown, for the outflow of heated air. Through the front panel 74 are openings79, 80 which register with the throat inlet and open front of the ash receptacle, re-' spectively. The damper plate operating rod 49 projects through suitable apertures in one of the side portions 67 of casing 62 and the side panel 76.

The operation is as follows: The walls of the chamber 33 will be heated to a high temperature due to conduction from the firepot 3, and to radiation from the fire-pot, because chamber 33 is positioned adjacent the fire-pot in heat absorbing relation to the hottest zone of the apparatus. When the damper control means 45 is moved by rod 49' to bring ports 44 and 46 into registry, air which passes up'through the space 62 and is warmed somewhat by contact with the fire-pot 3 and casing 62, will enter the chamber 33 due to the draft through the apparatus. The chamber 33 is constricted intermediate its top and bottom or its inlet and the inlets 53 to form a throat,

so that air entering the chamber 33 is caused.

to swirl and intimately contact the walls of the chamber wherebythe air is very highly heated before passage to the inlets 53. This highly heated air issues from the inlets 53 and is directed thereby over the bed of fire, and because of the high temperature and turbulence of the air it readily and thoroughly mixes with the gases and particles in the combustion chamber to insure complete combustion and the consequent elimination of smoke.

W hat I claim and desire to secure by Letters Patent of the United States is 1. A heating apparatus comprising a heatemitting element including a fire-pot, a combustion chamber and an ash-receptacle, a cas ing surrounding said element and spaced therefrom to form a vertical air passage, said casing having an opening, a fuel-charging throat having an inlet registering with said opening in the casing and connected to said fire-pot, a secondary air inlet through the wall of said fuel-charging throat, and a casing having an internal air preheating chamber communicating with said secondary air inlet and having an inlet communicating with the space between said heating element and said first-named casing.

2. A heating apparatus comprising a heat emitting element including a fire-pot, a combustion chamber and an ash-receptacle, a casing surrounding said element and spaced therefrom to form a vertical air passage, said casing having an opening, a fuel-charging throat having an inlet registering with said opening in the casing and connected to said lire-pot, a secondary air inlet through the wall of said fuel-charging throat, a casing having an internal air preheating chamber communicating with said secondary air inlet and having an inlet communicating with the space between said heating element and said first-named casing to receive heated air from said space, and means for controlling said secondary air inlet.

3. A heating apparatus comprising a heatemitting element including a fire-pot, a combustion chamber and an ash-receptacle, a casing surrounding said element and spaced therefrom to form a Vertical air passage, said casing having an opening, a "fuel-charging throat having an inlet registering with said opening in the casing and connected to said lire-pot, a secondary air inlet through the wall of said fuel-charging throat, a casing having an internal air preheating chamber communicating with said secondary air inlet and having an inlet communicating with the space between said heating element and said first-named casing to receive heated air from said space, a guard in said fuel-charging throat. and extending over said secondary air inlet, and means in the space between said heating element and said first-named casing for controlling said secondary air inlet.

4. A heating apparatus comprising a heatemitting element including a fire-pot, a combustion chamber and an ash-receptacle, a secondary air inlet discharging into said chamber, a casing having an internal air preheating chamber commumcatmg with sand inlet and havmg a substantially horizontal bottom ,wall, said bottom wall having an inlet to said second-named chamber, and means carried by said caslng for controlling the inlet to said second named chamber.

ondary air inlet discharging into said chamher, a casingin heat-conductingrelation with said element and having an internal .air pre heating chamber communicating with said inlet, said casing having an inlet at the lower end of said second-named chamber, and

means to cause the air passing through said casing to intimately contact the'heated walls of said casing. ,7

7. A heating apparatus comprising a heatemitting element including a tire-pot, a combustion chamber and an ash-receptacle, a sec-, ondary air inlet discharging into said chamber,and a casing rigid with and in heat-conducting relationwith said element and having an internal air preheating chamber communicating withsaid inlet, said casing having an inlet to said second-named chamber, said second named chamber being constricted to cause the air passing through saidisecond named chamber to intimately 1 contact the heated walls of said casing. v a

8. A heating apparatus comprising a heatemitting element including a til-spot, a combustion chamber and an ash-receptacle, a secondary air inlet discharging into said chamber, and a casing in heat-conducting relation with said element and havingan internal air preheating chamber, communicating with said inlet, said casing having an inlet to said second-named chamber, the walls of said casing converging toward each other beyondthe inlet to said second-named chamber to cause the-air passing through said second-named. chamber to intimately contact the heated walls of said casing.

9. A heating apparatus comprising a heatemitting element including a fire-pot, a combustion chamber and an ash-receptacle, a fuel-charging throat having an open under side and connected to saidulire-pot, a member closing the open under side of said throat and havinga secondary air inlet discharging into said element substantially in the plane of the'top of said fire-pot, a casing depending from said member and having an, in-

ternal air preheating chamber opening into said inlet, said casing having an inlet to said second named chamber, and means controlling the flow of air through said second named chamber.

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10. A h ti t comprising a be highly heated, and means to control air heat-emitting element including a fire-hot, flow through Said c mber acombustionchamber and an ash-receptacle,

a fuel-charging throat having an open under Signed y name- --s1de and connected to said fire-pot, a member closing the open under side of said throatand having a channel in its upper face for discharging secondary air into said element substantially in the plane of the top of said fire-pot, a guard plate supported on said mem-- her and closing the top of said channel, a casing depending from said member and having an internal air preheating chamber opening into said channel, said casing having an inlet to said second-named chamber, and means controlling the flow of air through said second-named chamber.

11. A heating apparatus comprising a heat-emitting element including a fire-pot, a combustion chamber and an ash-receptacle, a fuel-charging'throat connected to said firepot, the bottom wall of said throat having a secondary air inlet discharging into said element substantially in the plane of the top of said fire-pot, a casing depending from the bottom wall of said throat in heat-conducting relation with-said element and communicating with said inlet, said casing having an internal air preheating chamber and an air inlet to said second-named chamber, the side walls of said casing converging upward from the bottom thereof and converging downward from the top thereof to an intermediate point between the top and bottom of said casing whereby air entering said second named chamber will be caused to intimately contact the heated walls of said casing.

12. A device of the character described, comprising a casing adapted to be attached in heat-absorbing relation to a heating apparatus, said casing having an internal air preheating chamber and having an inlet and an outlet for air flow through said chamber, said outlet being adapted to be connected to a secondary air inlet of the heating appara' tus, said chamber converging intermediate said inlet and said outlet to form a throat to cause air flowing through said chamber to swirl and intimately contact the walls of said casing whereby the air in said chamber will be highly heated.

13. A device of the character described, comprising a casing adapted to be attached in heat absorbing relation to a heating apparatus, said casing having an internal air preheating chamber and having an inlet and an outlet for air flow through said chamber, said outlet being adapted to be connected to a secondary air inlet of the heating apparatus, said chamber converging intermediate said inlet and said outlet to form a throat to cause air flowing through said chamber to swirl and intimately contact the walls of said casing whereby the air in said chamber will In testimony whereof I have hereunto SUP-PBS. 

